KR19990010304A - Blood vessel stent - Google Patents

Blood vessel stent Download PDF

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Publication number
KR19990010304A
KR19990010304A KR1019970033064A KR19970033064A KR19990010304A KR 19990010304 A KR19990010304 A KR 19990010304A KR 1019970033064 A KR1019970033064 A KR 1019970033064A KR 19970033064 A KR19970033064 A KR 19970033064A KR 19990010304 A KR19990010304 A KR 19990010304A
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Prior art keywords
stent
blood vessels
blood
balloon
restenosis
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KR1019970033064A
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Korean (ko)
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장양수
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장양수
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19514626&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR19990010304(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 장양수 filed Critical 장양수
Priority to KR1019970033064A priority Critical patent/KR19990010304A/en
Priority to KR1019980028444A priority patent/KR100271231B1/en
Priority to JP20159998A priority patent/JP3343335B2/en
Priority to US09/118,133 priority patent/US6187035B1/en
Publication of KR19990010304A publication Critical patent/KR19990010304A/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
    • A61F2002/8483—Barbs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155—Adjacent bands being connected to each other

Abstract

1. 청구범위에 기재된 발명(고안)이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

병원의 순환기내과와 진단방사선과에서 주로 사용하는 의료기구로 혈관이 협착되었을 경우 기존의 개복수술에 의존한 방법이외에 의술의 발전으로 풍선카테터(Balloon Catheter)와 스텐트(Stent)라는 의료기구를 이용한 간단한 시술로 혈관의 협착된 부위를 제거해 주는데, 후자인 스텐트(Stent)라는 기구를 이용한 시술방법이 새로운 방법으로 발전되어 오고 있다.It is a medical device mainly used in the circulatory department of the hospital and the diagnostic radiology department. When blood vessels are constricted, it is a simple procedure using a balloon catheter and a stent. To remove the constriction of blood vessels, the latter method has been developed a new method using a technique called stent (Stent).

특히 스텐트(Stent)라는 시술은 스테인레스스틸(stainles steel)로 만든 망으로 협착된 혈관에 삽입후 혈관의 크기만큼 확산시켜 혈류의 흐름을 원활히 하여주는 의료기구이다.In particular, the stent is a medical device that smoothes the flow of blood by inserting it into a constricted blood vessel made of stainless steel and spreading it by the size of the blood vessel.

기존의 풍선(Balloon)으로 협착된 혈관을 넓힌 후 다시 재 협착이 오는 경우가 70%를 훨씬 넘고 있는바 이에 대한 발전적인 의료기구로 스텐트라는 금속망을 협착된 부위에 기존의 혈관크기만큼 확장시켜 줌으로써 재협착을 줄이는데 새로운 치료방법으로 소개되고 있다.More than 70% of the stenosis is widened after reconstricting blood vessels with the existing balloon. As an advanced medical device, stentra extends the metal network to the constricted area by the size of the existing vessel. It is being introduced as a new treatment to reduce restenosis.

이에 따라 여러 가지 스텐트 구조로 이미 사용되고는 있으나 그 구조에 따라 재협착률에 영향을 주는데 본 스텐트 디자인은 제협착률을 아주 낮추는데 기여하고 있다.Therefore, it is already used in various stent structures, but it affects the restenosis rate according to the structure. This stent design contributes to a very low restenosis rate.

이는 기존의 시술보다 더 발전된 것으로써 재발을 차단시켜 원래의 혈관과 같은 혈류를 공급해 주는 혁신적인 방법이라 할 수 있다.This is more advanced than the existing procedure, and it is an innovative method of supplying the same blood flow as the original blood vessel by blocking recurrence.

2. 발명(고안)이 해결하려고 하는 기술적 과제2. Technical problem to be solved by invention (design)

협심증 환자의 경우 관상동맥의 협착으로 인하여 심장 혈관의 갑작스런 폐쇄로 사망하는 사례가 있는데, 기존에는 풍선카테터(Balloon Catheter)를 이용하여 협착된 부위에 풍선으로 확장하여 혈관을 넓혀주었는데, 풍선확장후에 재발률이 높아 이를 개선하고자 혁신적으로 새로운 방법인 스텐트(Stent)라는 스테인레스스틸(Stainless steel 316L)로 된 재질로 만든 금속망으로 협착된 혈관부위에 인공적으로 혈관의 크기를 만들어 줌으로써 재발을 낮추는데 상당한 기여를 하여 오고 있다.In patients with angina pectoris, there is a case of sudden closure of the cardiovascular system due to coronary artery stenosis. In the past, a balloon catheter was used to expand the balloon to the constricted area. In order to improve this, it is a metal mesh made of stainless steel 316L, an innovative new method. Coming.

따라서 스텐트(Stent)는 기존의 의료기구보다 더 발전시킨 방법으로 개복수술에 의존하지 않고 간단한 기구로써 협착된 부위에 삽입후 혈관의 크기만큼 확장시켜주는데 이는 치료 및 원래의 혈류흐름과 같이 만들어 줌으로써 환자에게 통증이나 재협착없이 삶을 지켜주는 혁신적인 의술이라 할 수 있다.Therefore, the stent is a more advanced method than conventional medical instruments. It is a simple instrument that does not rely on laparotomy and expands it by the size of blood vessels after insertion into the constricted area. It is an innovative medicine that protects life without pain or restenosis.

3. 발명(고안)의 해결방법의 요지3. Summary of Solution to Invention

기존의 스텐트구조보다 다소 구조를 변형시킨 스텐트로써, 혈관의 굵기 및 형태에 맞게 그 모양을 만들어 주며, 또한 굴곡진곳에서도 쉽게 사용될 수 있도록 유연성을 주었고, 또한 분지 혈관(가지혈관)의 혈류흐름을 막지 않게 분지혈관 보호를 할 수 있도록 하였다.It is a stent with a slightly modified structure than the existing stent structure, and its shape is made according to the thickness and shape of blood vessels, and it also provides flexibility for easy use in curved areas, and also prevents the flow of branched blood vessels (branched blood vessels). It is possible to provide branched blood vessel protection.

또한 관상동맥의 협차된 부위에 쉽게 장착 및 장착후에 잘 지탱될 수 있도록 그 구조를 설계하였다.In addition, the structure of the coronary artery is designed so that it can be easily supported on the narrowed part of the coronary artery.

스텐트 협착된 부위에 전달시킬 때 풍선위에 납짝하고 둥굴게 눌러 움직이지 않게 한후 풍선과 함께 삽입하는데 이때 쉽게 풍선에 씌울 수 있도록 하기 위해 좁혔을 때 1㎜이하로 되도록 아주 작은 관(직경:1.4㎜)으로 만들었다.When delivered to the stent stenosis, press the balloon flat on the balloon to prevent it from moving and insert it with the balloon. At this time, a very small tube (diameter: 1.4 mm) should be smaller than 1 mm when narrowed so that it can be easily covered. Made with.

또한 유연성을 주기위해 가운데에 U자형의 모양을 주었고, 둥근망의 모양을 잘 지탱할 수 있도록 그 펼쳤을 때의 힘을 갖기 위해 각각의 간격을 좁게 하였다.Also, to give flexibility, the U-shape is given in the middle, and each gap is narrowed to have the force when it is unfolded to support the shape of the rounded net.

4. 발명(고안)의 중요한 용도4. Significant Uses of Invention

콜레스테롤 등의 원인으로 관상동맥의 협착, 말초혈관의 협착 및 인체내의 혈관의 협착으로 혈류의 흐름이 저하되거나 이로인하여 심한 통증이나 급작스런 사망의 원인을 제공하게 됨으로 스텐트를 협착된 곳에 장착(사용)하여 헙착된 곳을 제거 및 재협착의 치료를 가져다 준다.The stent may be mounted (used) in the constricted area due to cholesterol, narrowing of coronary arteries, narrowing of peripheral blood vessels, and narrowing of blood vessels in the human body. Remove the stuck place and bring treatment of restenosis.

특히 관상동맥의 협착환자나 말초혈관의 협착환자에게 사용하며, 이는 원래의 혈관으로 만들어 줌은 물론 혈류를 흐름을 정상으로 하며, 특히 분지 혈류의 흐름을 방해하지 않으며 스텐트 자체에 유연성을 갖고 있어 굴곡진곳에서도 사용할 수 있는 특징을 갖고 있다.Especially for patients with coronary artery stenosis or peripheral blood vessel stenosis, it makes the original blood vessels and normalizes the flow of blood. Especially, it does not interfere with the flow of branched blood and has flexibility in the stent itself. It has a feature that can be used even in a dusty place.

Description

혈관용 스텐트(Vascular stent)Vascular stent

가. 도면 제1도의 설명end. Description of Drawings 1

이는 레이저 커팅기에 입력시키기 위하여 컴퓨터로 만든 디자인으로 이 구조에 있어 각각 가운데 U자형을 주어 굴곡진 혈관에 쉽게 장착될 수 있도록 유연성을 주었고 또한 각각의 간격을 좁게하여 완전히 펼쳐졌을 때 그 힘을 잘 유지할 수 있도록 하였다.This is a computer-generated design for input into the laser cutting machine, which has a U-shape in each of these structures for flexibility in mounting into curved vessels, as well as narrowing the spacing between each to maintain its strength when fully deployed. To make it possible.

두께도 혈류의 흐름에 영향을 미치지 않도록 하기 위해 0.090㎜×0.080㎜ 이하로 하였다.The thickness was set to 0.090 mm × 0.080 mm or less in order not to affect the flow of blood flow.

나. 도면 제2도의 설명I. Description of Drawings 2

이는 완성되었을 때의 모양으로 혈관의 모양과 같도록 가운데의 직경모양을 둥굴게 하였고, 펼쳐 졌을 때 그 힘을 받도록 각각의 구조의 간격을 좁게 하였다.This resulted in a rounded diameter in the middle to match the shape of blood vessels when completed, and narrowed the spacing of each structure to receive its force when unfolded.

따라서 스텐트를 완성했을 때 직경 2.0㎜-5.75㎜, 길이 16㎜-60㎜의 아주 작은 관으로 직경과 길이에 따라 크기가 달라지게 하였다.Therefore, when the stent was completed, the size of the tube was very small, with a diameter of 2.0 mm-5.75 mm and a length of 16 mm-60 mm.

좁아졌을 때 내경은 1㎜이하이며, 폈을 때 내경은 최대 5.75㎜까지 넓혀준다.When narrowed, the inner diameter is 1 mm or less, and when it is narrowed, the inner diameter is widened to a maximum of 5.75 mm.

다. 도면 제3도의 설명All. Description of Figure 3

각 구조의 길이를 설명하고 있다.The length of each structure is described.

라. 도면 제4도의 설명la. Description of Figure 4

스텐트가 펼쳐졌을 때의 길이 및 굴곡이 진 부분의 길이를 나타내고 있다.The length when the stent is unfolded and the length of the bent portion are shown.

가. 발명(고안)의 목적end. Purpose of Invention

(1) 발명(고안)이 속하는 기술분야 및 그 분야의 종래기술(1) The technical field to which the invention (draft) belongs and the prior art in that field

혈관이 협착된 환자의 경우 치료방법에는 두가지가 있는데, 첫째는 수술을 하여 좁아진 혈관을 우회술로서 인공적으로 연결시켜 주는 방법이 있고, 둘째는 좁아진 혈관을 가는 풍선을 삽입한 후 협착된 부위에 고정시켜 풍선확장을 하여 협착된 곳을 넓혀주는 방법이 있고, 셋째는 금속망 스텐트(재질:스테인레스스틸)를 삽입, 장착시켜 원래의 혈관 크기로 넓혀줌으로써 치료 및 정상적인 혈류의 흐름을 유지하게 하는 방법이 있다.There are two treatment methods for patients who have narrowed blood vessels. First, there is a method that artificially connects narrowed blood vessels by surgery, and secondly, inserts a narrow balloon to fix the narrowed blood vessels and fixes them to the narrowed area. There is a method of expanding the stenosis by expanding the balloon, and the third method is to insert a metal mesh stent (material: stainless steel) and widen it to the size of the original blood vessel to maintain treatment and normal blood flow. .

이중 첫 번째는 수술에 의한 방법이며, 둘째는기존의 방법으로 재협착율을 낮추는데 기여를 못하고 있다.The first method is surgery, and the second method is not contributing to the lowering of restenosis by conventional methods.

따라서 셋째인 스텐트에 의한 방법이 새롭게 시술되고 있으나 재품의 질(구조, 재질, 두께, 유순함, 분지보호……)에 따라 재협착의 영향을 줄 수 있다.Therefore, the third method of stent is newly performed, but may affect the restenosis depending on the quality of the product (structure, material, thickness, docility, branch protection ……).

이때 기존의 제품보다 특이한 것은 도면에서 보는 바와 같이 가운데를 U자형을 주어 유연하도록 하였고, 두께를 얇고 강하게 둥근관을 지탱하도록 하여 기존의 제품보다도 더 재협착율을 낮추는데 그 특징이 있다.At this time, what is more unusual than the existing product is that it is flexible to give a U-shape in the middle as shown in the drawing, and has a feature of lowering the restenosis rate more than the existing product by supporting the thin and strongly round tube.

또한 직경이 최대한 작아졌을 때 내경을 1㎜이하로 하여 쉽게 전달, 삽입 및 장착될 수 있도록 하였다.In addition, when the diameter is as small as possible, the inner diameter is less than 1mm to be easily transmitted, inserted and mounted.

이때 스텐트를 삽입시킬때는 풍선카테터(Balloon Catheter)에 감싼후 협착부위까지 삽입하여 풍선을 그 직경의 크기만큼 확장시켜 안전하게 고정시킨다.At this time, when inserting the stent, it is wrapped in a balloon catheter and inserted into the stenosis to expand the balloon by the size of its diameter and securely fix it.

따라서 이와 연관된 분야로 병원의 순환기 내과나 진단방사선과에서 환자에게 시술하는 방법이다.Therefore, the related field is a method for the patient in the circulatory or internal medicine department of the hospital.

(2) 발명(고안)이 이루고자 하는 기술적 과제(2) Technical problem to be invented

혈관의 재협착을 방지하기 위해 혈관직경의 크기만큼 확장시킬 수 있도록 하였고, 특히 굴곡이 있는 혈관에 사용될 수 있도록 U자의 모양으로 스텐트의 유순함을 강조하여 만들었고, 또한 혈관의 협착된 부위가 오랫동안 재협착없이 잘 지탱되도록 스텐트를 혈관의 힘이 맞게 강하게 지탱되도록 하였다.In order to prevent the restenosis of blood vessels, it can be expanded by the size of blood vessel diameter, and in order to be used for curved blood vessels, the shape of U is made to emphasize the suppleness of the stent. The stent was supported by the vessel's strength so that it could be well supported.

두께는 얇게하여 혈전이 생기는 것을 막아주어 재협착을 방지하였다.The thickness was reduced to prevent the formation of blood clots to prevent restenosis.

스텐트를 만들때 먼저 스텐트를 디자인한 프로그램이 입력된 레이저커팅기로 직경이 1.4㎜인 둥근관을 레이져커팅기로 절단한 후, 다시 옆모리서와 표면을 매끄럽게 재 처리한다.When making a stent, first cut a 1.4 mm diameter round tube with a laser cutter using a laser cutting machine that has entered the program that designed the stent, and then reprocess the side edger and the surface smoothly.

두께는 옆면 0.090㎜×두께 0.080㎜이하로 스텐트에 힘(Radial Force)이 있도록 고려하여 다듬는다.The thickness should be trimmed considering that there is a radial force on the stent, which is less than 0.090 mm x 0.080 mm thick.

나. 발명(고안)의 구성 및 작용I. Composition and Function of Invention

바깥지름이 1.4㎜의 스테인레스 관을 아주 작은 레이저(Laser)빔으로 길이에 따라 도면과 같이 커팅한 후 잘 다듬어 혈관의 직경과 길이에 맞는 풍선카테터에 장착시켜 좁아진 혈관에 삽입한 후 풍선을 혈관 크기만큼 부풀어 주어 협착된 혈관 벽에 인공적으로 붙게하여 협착된 곳을 제거해주는 것은 물론 재협착을 거의 없게하여 기존의 정상적인 혈류의 흐름과 같이 만들어 준다.The stainless steel tube with an outer diameter of 1.4mm is cut with a very small laser beam as shown in the drawing and then trimmed.Then, it is mounted on a balloon catheter that fits the diameter and length of the vessel. It swells as much as it artificially attaches to the constricted blood vessel walls to remove the constricted spots, as well as almost no restenosis, making it like the existing normal blood flow.

세부적으로 설명하면, 직경이 1.4㎜(1.6㎜나 2.2㎜도 관계없슴)의 인체에 전혀 무해한 재질인 스테인레스스틸 316의 관을 디자인한대로 레이저커팅기로 커팅한 후 다시 표면과 모서리를 매끄럽게 처리한 후 가는 풍선(보통 풍선카테터라부르며, 전체 길이 135㎝, 두께 1㎜이하로 심장혈관에 까지 쉽게 도달될 수 있도록 되어 있다)에 스텐트에 씌웠을 때 움직이지 하기 위해 두께를 1.4㎜의 아주 작은 관으로 만들었고 힘을 받도록 그 디자인을 하였다.In detail, the stainless steel 316 tube of 1.4 mm diameter (no matter 1.6 mm or 2.2 mm), which is completely harmless to the human body, was cut with a laser cutting machine, and the surface and edges were smoothed again. The balloon (usually called a balloon catheter, is 135 cm long and less than 1 mm thick so that it can easily reach the cardiovascular system) is made of a very small 1.4 mm tube that will not move when placed on the stent. The design was designed to receive power.

좁히고 넓힘에 따라 최소직경이 1㎜이하에서 5.75㎜이상으로 되도록 설계하였다.The narrower and wider the design, the minimum diameter is less than 1mm and 5.75mm or more.

다음의 그림은 완제품사진으로 밖과 안을 둥굴게 하여 주어 혈류의 흐름에 영향을 주거나 재발이 없도록 그 모양을 잘 유지 하도록 하였으며, 특히 굴곡이 진 혈관에 쉽게 사용되도록 유연성을 주었다.The following figure is a finished product, rounded out and inside to maintain its shape without affecting blood flow or recurrence, especially for flexed blood vessels.

다. 발명(고안)의 효과All. Effect of invention (design)

기존의 것과 디자인이 다르며, 이 스텐트는 혈관의 협착된 곳에 장착시 안전하게 혈관의 크기만큼 확장하여 주며, 특히 굴곡진 곳의 협착된 혈관에 유순하게 장착하는 특징을 갖고 있으며, 두께가 얇기 때문에 특히 재협착을 없애준다.The design differs from the existing one, and this stent safely expands by the size of the vessel when it is placed in the constricted area of the vessel, and is particularly flexible in the constricted vessel in the curved area. Eliminate stenosis

또한 옆가지 혈관(분지혈관)의 혈류 흐름에 영향을 주지 않는 특징을 갖고 있다.In addition, it has a characteristic that does not affect the flow of blood vessels (branch).

다음 그림은 심장의 혈관과 혈관이 협착된 부위에 스텐트를 사용하여 협착된 부위를 기존의 혈관만큼 넓혀 주어 협착된 혈관을 원래의 모양대로 하여 환자를 치료하여 주는 효과를 주는 실예를 첨부하였다.The following figure is attached with an example that the stent is used to expand the constricted blood vessels and the constricted blood vessels by the existing vessels to treat the patients with the constricted blood vessels in their original shape.

그림 1은 협착된 혈관에 스텐트를 장착시키는 것을 설명하고 있으며, 그림 2는 심장혈관의 우측 혈관이 협착되어 있는 것을 스텐트로 넓혀준 후를 설명하고 있다.Figure 1 illustrates the placement of the stent in the constricted blood vessels, and Figure 2 illustrates the expansion of the constriction of the right vessels of the cardiovascular system with the stent.

[그림 1][Figure 1]

[그림 2][Figure 2]

Claims (1)

직경은 최소 2.0㎜에서 최대 5.75㎜이며, 길이는 9㎜에서 60㎜로 혈관의 협착된 곳을 원래의 혈관으로 넓혀주는 혈관용 스텐트이다.Its diameter ranges from 2.0mm up to 5.75mm and its length is from 9mm to 60mm.
KR1019970033064A 1997-07-16 1997-07-16 Blood vessel stent KR19990010304A (en)

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KR1019980028444A KR100271231B1 (en) 1997-07-16 1998-07-14 Stent for blood vessel
JP20159998A JP3343335B2 (en) 1997-07-16 1998-07-16 Vascular stent
US09/118,133 US6187035B1 (en) 1997-07-16 1998-07-16 Vascular stent

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